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Detection of Incompetent Perforator Veins

Publishing Venue

The IP.com Prior Art Database

Abstract

The invention is apparatus and method for detecting incompetent perforator veins to facilitate saphenous sparing superficial venous ablation. The invention includes placing a catheter in the vein, isolation of venous segments, introduction of fluid in a controlled manner, and monitoring the resulting pressure in the isolated venous segment. Pressure, flow rate, volume, diameter, impedance, and so forth can be used as inputs or outputs, but infusing fluid and monitoring pressure may be the most straightforward. A small amount of fluid may be infused in a step- or bolus- fashion, in alternating infusion / withdrawal pattern (which may include a net infusion over time to avoid removal of any significant amount of blood, or infusion at one flow rate followed by another flow rate, and so forth. A faster decay in pressure after a sudden infusion, for example, would indicate an incompetent perforator vein in the isolated segment. The presence of an incompetent vein would also produce a different amplitude and phase lag in a measured parameter upon application of pulsatile infusion.

Country

United States

Language

English (United States)

This text was extracted from a Microsoft Word document.

This is the abbreviated version, containing approximately
100% of the total text.

The invention is
apparatus and method for detecting incompetent perforator veins to facilitate
saphenous sparing superficial venous ablation. The invention includes placing a
catheter in the vein, isolation of venous segments, introduction of fluid in a controlled
manner, and monitoring the resulting pressure in the isolated venous segment.
Pressure, flow rate, volume, diameter, impedance, and so forth can be used as
inputs or outputs, but infusing fluid and monitoring pressure may be the most
straightforward. A small amount of fluid may be infused in a step- or bolus-
fashion, in alternating infusion / withdrawal pattern (which may include a net
infusion over time to avoid removal of any significant amount of blood, or
infusion at one flow rate followed by another flow rate, and so forth. A faster
decay in pressure after a sudden infusion, for example, would indicate an
incompetent perforator vein in the isolated segment. The presence of an
incompetent vein would also produce a different
amplitude and phase lag in a measured parameter upon application of pulsatile
infusion.